Improvement in gripers for cylinder printing-presses



UETTED STATES PATENT OFFICE.

VICTOR E. MAUGER, OF NEV YORK, N. Y.

Specification forming part of Letters Patent No. 116,616, dated July 4, 1871.

To all whom t may concern:

Be it known that I, Vieron E. MAUGEE, of New York city, in the @mint-y and State of New York, have invented a new and Improved Griper Attachment to Printiiig-(lylinders5 and I do hereby declare that the iollowing is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawing forming part of this speciiieation.

Figure 1 represents a vertical transverse section ot' a cylinder provided with my improved griper attachment. Fig. 2 is a` side view, partly in section, of the same.

Similar letters of reference indicate correspondin g parts.

The cylinders of prii)ting-presses are provided with gripers for holding the paper during the process of printing. Where one cylin der receives the sheets of paper alternately from opposite sides to carry them in oppositel directions over the printing-bed, it must be provided with two sets of gripers. The object of my invention is to provide the cylinders of such two-feeder presses with adjustable gripers, so that sheets of suitable lengths can be held therein. The invention consists in the use of radial spring-griliers guided in movable tubes, which can be ret inthe perforated eylinder, so that one set will be a suitable distance from the other set of gripers. A set of cams on the stationary central shaft serves to move the radial gripcrs for opening and closing the same.

A in the drawing represents a printing-cylinder, of suitable construction, hung upon al stationary shaft, B, so as to oscillate thereon when impelled by suitable mechanism. The cylinder has two or more rows of apertures, a a, for the reception of tubes I) b, which serve as guides and holders for the gripers. C C are the adjustable gripers. They are made in the form ot' cylindrical or prismatic rods, with hooks (l d at their The sha1 iks ofthe gripers are fitted outer ends.

into the tubes b and ride on cams D D, which are mounted upon the shaft B. Spiral or other springs e act against the gripers, tending to draw them inwardly against the cams. Whenever the ends of the griper-shanks arrive at the depressed portions of the cams the griper-hooks d are drawn against the circumference of the cylinder to hold and retain the paper till the projectin g parts of the cams raise the gripers and release the sheet. All t-he gripers of one set are in one row, the tubes for guiding them being `Vscrewed into (ne set of holes. The second set of gripers on the same cylinder may be'of the same kind above described 5 or it may, as in Fig. 1, consist of cranks fj' on a vibrating rod, g, which is pivoted to the cylinder, similar to or identica-l with the gripers in common use. The distance between the two sets of gripers can be varied by screwing the tubes b and their contents into another row of holes.

By this invention two-feeder cylinder-presses can be adapted for use on sheets of suitable sizes,

whereby the scope of their usefulness and their consequent value will be greatly increased. The shaft B may be made to rotate if the cams are mounted upon a tube embracing the shaft but not revolving on it. The apertures in the cyli11- der not filled by the tubes I) can be closed by means of suitable plugs, which will leave the printing-face of the cylinder smooth and solid. l1`hese plugs may be applied or fastened from the inner side, and fixed in suitable manner.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The printing-cylinder, perforated in rows to receive adjustable gripers, as set forth.

2. rlhe radial gripers O (l, riding on cams D and guided in movable tubes b, substantially as herein setforth and described.

VICTOR E. MAUGER.

\Vitnesses:

A. V. BniEsEN, GEORGE IV. M'ABEE. 

